v0.2.0

• Fixed bug: Portals are wrongfully destroyed on any neighbouring block update
• Simplified portal creation and destruction logic
• Added PlayerCreatePortalEvent::$transaction property to track changed blocks
  This is useful for grief prevention plugins and the likes, to perform checks for whether a portal intersects a protected region:

  /** @var PlayerCreatePortalEvent $event */
  $positions = [];
  foreach($event->transaction->getBlocks() as [$x, $y, $z, $block]){
  	$positions[] = new Vector3($x, $y, $z);
  }
  $min = Vector3::minComponents(...$positions);
  $max = Vector3::maxComponents(...$positions);
  if(/* min-max intersects a protected region */){
  	$event->cancel();
  }